Jetty structure



Nov. 18, 1941 G. w. REHFELD JETTY STRUCTURE 2 Sheets-Sheet 1 Filed Sept. .23, 1938 INVENTOR Geo W mew/a. B

ATTORNEY Nov. 18, 1941. G. w. REHFEL D 2,263,513

JETTY STRUCTURE Filed Sept. 23, 1938 2 Sheets-Sheet 2 INVENTOR ATTORNEY Patented Nov. 18, 1941 UNITED STATES PATENT oFFIcE/f JETTY STRUCTURE George W. Rehfeld, Manhattan, Kans.

Application September 23, 1938, Serial No. 231,360

(Cl. 614)v Claims,

This invention relates to jetty structures and more particularly to an open framework jetty structure of the character employed for controlling the course of rivers or streams in a manner, for example, to prevent erosion of land from and to facilitate accretion of land'upon the river bed or stream banks bounding such water courses. I

The principal objects of the present invention are to provide a jetty structure capable of protecting bridges, highways, railroad lines and the like through control of water courses adjacent thereto; to so arrange the framework of the structure as to provide for tilting, twisting and/or turning the structure whereby the structure may be most strategically positioned inrelation to existing water course conditions such 'as the force of water current, density of the river or like bed, and angles of the river or like banks, and to provide the jetty structure. with multiple, for example, two-and/or four, point support relative to its placement on a water course bed or bank.

Further important objects of the present inthe surface of the jetty structure, and to provide l for creating a wider base obstruction to flow adapted to be arranged in angular relation to such flow for enhancing effective action of the jetty structure.

Other objects of the present invention are provide a convenient manner of building up the jetty structure through the use of angle orlike irons; to provide for interlocking individual jetty structureswhereby they cooperate in main- .25 vention are to provide for dividing the obstrucis illustrated in the accompanying. drawings,

wherein:

Fig. 1 is a perspective view of a series of inter connected jetties embodying the features of the present invention placed in a water course for controlling the same.

Fig. 2 is a detail perspective'view of an individual jetty unit embodying the features of the present invention, one form of threading for th anchor rods being shown in full lines.

Fig.3 is a plan view of the. jetty structure-or unit illustrated in Fig. 1.

Fig. 4 is a side elevational View of the. jetty structure illustrated in Fig. 3, substantially from the line 4-4 in Fig. 3.

Fig. 5 is a detail plan view, partly in section, illustrating the manner of interconnecting. certain. of the angle irons which make up'a' jetty embodying the present invention.

Referring more in detail to the drawings:" 1,2, 3, 4, and 5, Fig. '1, generally designate individualunits of a jetty structureernbodying the features of the present invention, whichzunits are preferably interconnected by a line of r'ods or the like 6, which terminate in a connection with an anchor such as the dead man 1- suitably fixed, for example, in the bank 8 of a water course 9.

Each unit of the jetty structure preferably consists of a plurality of structural irons, such as angle irons, as shown in Figs. 2 to'4, which angle irons, for convenience of description, are designated, by each of the ends thereof, Ill-l I, l2l3, |4I5, Iii-I1, l8l9, and'202l, respectively. F

Th preferable arrangement of the angle irons is to provide a substantially pyramidal center 22 from which opposite ends of the angle irons project in such a manner as to provide n h other erect; to p v de the jetty bearing points to set the jetty structure upon structure with a substantially pyramidal center which aids in rendering the structure strong and self supporting; to provide an improved arrangement for anchoring the jetty structure or and embed the samein a water course'bed or bank for securing the jettystructure in desired strategically effective position.

To this end, a convenient manner of arranga series thereof whereby their maintenance in 'ing the angle irons of the jetty structure is to erected condition is facilitated; and toprovide improved elements forming a'jett'y structure of this character; together with improved arrangements'of those elements whereby a conveniently placed, economical and highly efficient jetty 50 structure an'd'positions thereof relative to a water course may be provided.

In accomplishing these and other objects of the present invention, I have provided improved position the angle iron I0-l'l lengthwise at an angle to the horizontal and slightly to the rear of a vertical plane with the angle formed .by'the flanges thereof turned downwardly. The angle iron l2l3 may then'be positioned lengthwise at an opposite angle to the horizontal with its flange formed angle turned outwardly and in approximately the same plane from the vertical as the angle iron l0-l I, the adjacent flanges details of structure, the preferred jformof which of the angle irons being in overlapped relation,

and the angle irons crossing each other approximately at the lower portion of their length, after which these angle irons may be secured together, as by fastening devices 23. The transverse angle iron |8|9 may then be mounted in the angle 2'4 formed between the ends H and I2 of the angle irons lllll and I 2l3 respectively with its flange formed angle turned downwardly in such a manner that one flange thereof may be secured to one flange of the angle iron l2|3 by a suitable fastening device 25, the angle iron l8|9 being secured to the angle iron I2--I3 at approximately the forward portion of the length thereof.

The angle iron I l-I5 may then be positioned in upwardly and forwardly inclined relation from horizontal and vertical planes respectively in an arrangement crossing the transverse angle iron l8--|9 below the same and approximately at the rear portion thereof, and continuing upwardly to pass below the upper portion of the. angle iron l2l3, the end l5 of the angle iron [4-45 then projecting upwardly to terminate in a debris and/or flotage trapping point or end. The angle irons l4l5 and l8l9 are preferably secured together by a suitable fastening device 26 at the point at which they cross.

The angle iron l6ll is then positioned in upwardly and forwardly extending relation to horizontal and vertical planes respectively, and angled to the right, as shown in Fig. 3, with its angle turned rearwardly in such a manner that it overlies, and its lower flange engages, the top flange of the angle iron l4|5, the angle irons I4--l5 and Iii-l1 being secured together, as by a fastening device 21, the angle iron l6-l| continuing upwardly and angularly to cross the angle iron l-I I approximately at the upper portion thereof.

The angle iron 202I is utilized to tie the upper ends of the previously described angle irons together, and. is preferably arranged in transverse relation to the angle iron l8l9, the left third thereof preferably being positioned in the angle 28 formed between the ends l3 and I of the angle irons I 2'-I3 and Ml5. The angle iron -2I is positioned with its angle turned upwardly in such a manner that one flange thereof'may be secured to an adjacent flange of the angle iron I4-l5, as bya fastening device 29, and its other flange may be secured to an adjacent flange of the angle iron I2I3, as by a fastening device 30. The right hand portion of the angle iron 202I preferably underlies the upper portion of the angle iron |6ll and overlies the angle iron Hlll approximately at the upper portion thereof, one flange of the angle iron 2'02l being secured to one flange of the angle iron l0|l by a suitable fastening device, asindicated at 3|, and the other flange of the angle iron 2il2'l being secured to the nearest flange of the angle iron I6|l by a suitable fastening device, as indicated at 32.

While a single jetty unit has been particularly described, as a matter of practice, a series of such units are preferably employed for controlling water courses, and to this end, as illustrated in Fig. l, a series of jetty units are preferably secured together by the rod line 5. The rod line 6 is preferably formed of a series of interconnected rods 33 and 34, preferably solid in crosssection to better withstand strains and stresses caused by current of the water course and impacts of floating debris, and further, to better withstand action of chemicals in the water courses as well as to avoid snapping or excessive resiliency when securing a series of jetty units together. The rods of the line are preferably positioned relative to the angle irons in such a manner that clamping, shearing or cutting of the rods by movement of the jetty units is avoided. The rods, further, may be interwoven, as illustrated in Figs. 2 and 3, and the crossing portions thereof may sometimes be secured together by a fastening device 35 to prevent slippage of the jetty units up or down the rod line.

It will be recognized that conditions in water courses vary in different localities and with the seasons. For example, river banks may be high at a certain point in a river, and, for example, spring floods may seriously affect the water course and the banks thereof. With such variable conditions to meet and overcome, it has been found desirable to sometimes provide each jetty unit with a two-point support. For example, when the current is flowing in the direction of the arrow, illustrated in Fig. 2, the ends ill and [6 of the angle irons Ill-4| and l6l1 may be set into the river bed, and the remainder of the jetty unit supported solely thereby. It is apparent, under such conditions, that thecurrent of the water course tends to tilt the jetty unit in a downward left hand direction, relative to Fig. 2, and that the rod line 6 tends to maintain the jetty unit in upright condition on its twopoint support l0 and Hi.

Under other conditions, it has been found desirable to provide each jetty unit with a fourpoint support and. this may be accomplished, for example by embedding the points l0 and I6 of the angle irons |lll| and IB--I1 into the ground, as was above suggested, and then tilting the unit in an upward right hand direction, relative to Fig. 2, in such a manner that the ends I2 and I 4 of the angle irons l2-l3 and l4.l5 respectively are embedded in the bed of the river course. The rod line 6 and particularly the rods 33 and 34 thereof under such conditions maintain the jetty unit in fixed position in cooperation with the embedded ends of the angle irons. 1

Under conditions similar to that shown in Fig. 1, the jetty units 4 and 5 are mounted on the bank 8 and the lower ends [2 and [4 of the angle irons l2l3 and I4|5 cooperate with the end 2| of the angle iron 202'| in forming a threepoint support for the jetty unit.

With the arrangement of angle irons formed to provide a center pyramidal conformation, it is apparent that the ends of the angle irons project in many directions from the center of the unit and thus enhance the catching and trapping of debris and flotage in the river course. This catching and trapping action of the jetty increases progressively with the quantity of debris in the river course for the reason that each particle of debris serves to enlarge the obstructing area of the jetty and itself cooperates with the jetty in building up an accreted or alluvial formation.

The obstruction formed by the jetty unit is divided and in its preferable arrangement illustrated, a relatively great mass is at the upper portion of the jetty unit, the effect of which is to catch and trap a greater amount of debris and thus more quickly build up the alluvial formation necessary to adequately control the water course.

If desired, the units may be arranged in close proximity to present a substantially solid unit composed of a series of units. Under such conditions, the upper ends I3, 20 and at one corner of the jetty unit may be interlaced with the adjacent upper ends H, 2| and I! of the angle irons of an adjoining jetty unit to provide a substantially solid mass across the surface of the jetty structure.

Asa matter of practice, lacing such as wire,

is also sometimes provided on and/or about the jetty unit to further enhance the jetty action thereof.

If desired, additional lines of jetty structure maybe staggered in relation to each other to further effect a substantially solid mass employed as an obstruction to catch and trap floating debris, silt and the like in the Water courses, thus building a new or strengthened river or stream bank to direct the water flowing through the course in a desired and most beneficial manner,

It is further apparent that as the angular relation of the jetty structure varies relative to the course in which it is positioned, the anchoring rods may be threaded through the pyramidal center of each unit and/or through and about each side of each unit in accordance with the requirements of the particular installation, suitable arrangements of anchor rod threading being shown in dotted lines in Fig. 2.

What I claim and desire to secure by Letters Patent is:

1. A jetty structure of the character described comprising a pair of upwardly extending structural members crossed approximately at a point defining the lower portion of their length, a second pair of upwardly extending structural members crossed approximately at a point defining the lower portion of their length, said second named pair of members crossing said first named members respectively at points defining approximately the upper portion of said members, a transverse structural member having its ends mounted in angles formed by said crossed members, a second transverse structural member having its ends mounted in angles formed by said crossed members other than those occupied by said first named transverse member, and means connecting said structural members together.

2. In a jetty structure of the character described, two pairs of upwardly extending structural members, the lower portions of each of said pairs of structural members crossing each other and the upper portions of each of said members crossing the upper portions of the respective members of the other pair, and means connecting said members in crossed relation.

3. In a jetty structure of the character described, two pairs of upwardly extending structural members, the lower portions of each of said pairs of structural members crossing each other and the upper portions of each of said members crossing the upper portions of the respective members of the other pair, structural members mounted in angles formed by said crossed pairs of structural members for connecting said pairs of structural members at the points of crossing of the respective members thereof.

4. In a jetty structure of the character described, pairs of structural members, the lower portions of each of said pairs of structural members crossing each other and the upper portions of each of said members crossing the upper portions of the respective members of the other pair,

means connecting said members in crossed relation, and means connecting the structure to a support, a portion of said support connecting means passing between crossed portions of certain of the members and bearing against other portions of the members to support the structure in erected position on a plurality of ends of said crossed structural members.

5. In a jetty structure of the character described, pairs of upwardly extending structural members, the lower portions of each of said pairs of structural members crossing each other and the upper portions of each of said members crossing the upper portions of the respective members of the other pair, means connecting said members in crossed relation, said structural members having projecting ends forming a multiple point support of an even number of points for the structure in a course in which the structure is positioned, said projecting ends maintaining the structure in effective relation to the course when tilted, twisted and turned relative to said course.

6. In a jetty structure of the character described, pairs of upwardly extending structural members, the lower portions of each of said pairs of structural members crossing each other and the upper portions of each of said members crossing the upper portions of the respective members of the other pair, transverse structural members mounted in the angles formed by said crossed pairs of upwardly extending structural members, means connecting all of said structural members in crossed relation, and means connecting the structure to a support, a portion of said last named connecting means passing between crossed portions of certain of the members and bearing against other portions of the members to support the structurev in erected position on a plurality of ends of said crossed structural members.

'7. In a jetty structure of the character described, pairs of upwardly extending structural members, the lower portions of each of said pairs of structural members crossing each other and the upper portions of each of said members crossing the upper portions of the respective members of the other pair, transverse structural members mounted in the angles formed by said crossed pairs of structural members, and means connecting all of said members in crossed relation, all of said structural members having projecting ends forming a multiple point support of an even number of points for the structure in a course in which the structure is positioned, said projecting ends maintaining the structure in effective relation to the course when tilted, twisted and turned relative to said course.

8. A jetty structure of the character described, comprising a pair of upwardly extending structural members crossed approximately at a point defining the lower portion of their length, a second pair of upwardly extending structural members crossed approximately at a point defining the lower portion of their length, said second pair of members crossing said first pair of members at points defining approximately the upper portions of said members, and upper and lower transverse members connected to the pairs of structural members at the upper and lower portions of the jetty and disposed approximately at right angles to each other, said pairs of structural members providing a four-point support for the jetty.

9. A jetty structure of the character described,

comprising a pair of upwardly extending structural members crossed approximately at a point defining the lower portion of their length, a second pair of upwardly extending structural members crossed approximately at a point defining the lower portion of their length, said second pair of members crossing said first pair of members, at points defining approximately the upper portions of said members, and upper and lower transverse members connected to the pairs of structural members at the-upper and lower portions of the jetty and disposed approximately at right angles to each other said pairs of structural members providing a four-point support for the jetty, and said jetty being tiltable on two of the four points of support to provide a two-point support for the jetty.

10.. A jetty structure of the character described, comprising a pair of upwardly extending structural members crossed approximately at a point defining the lower portion of their length, a. second pair of upwardly extending structural members crossed approximately at a point defining the lower portion of their length, said second pair of members crossing said first pair of members, at points defining approximately the upper portions of said members, and upper and lower transverse members connected to the pairs of structural members at the upper and lower portions of the jetty and disposed approximately at right angles to each other, said pairs of structural members providing a fourpoint support for the jetty, and said jetty being tiltable on two of the four points of support to provide a two-point support for the jetty, and means for maintaining the jetty in its two-point supported position.

GEORGE W. REHFELD. 

